Specifications

23
Testing Testing Transmission Systems
the ignition first turned on, the Service Need Display appears under the speedometer in the
instrument cluster for 10 seconds replacing the fuel level. The first line corresponds to
mileage-dependent service items, specifying the mileage when the next service is due. A
minus sign means that mileage has been exceeded and service is overdue. The second line
corresponds to the time-dependent service items and is displayed with a clock symbol. It
specifies the weeks/months/years until the next service is due. More information on the actual
service or maintenance item can be viewed in the Control Display.
4.1.5 Review ECM ID
This test displays ECM identification information.
4.2 Testing Transmission Systems
The scan tool offers the following testing options for electronic automatic transmissions.
• Codes and Data
• Functional Tests
• Special Functions
• Shift Adaptation Reset (Transmission)
• ECU Identification
4.2.1 Transmission Applications
Table 4-7 lists BMW electronic transmissions and their features, and Table 4-8 lists BMW
electronic transmissions with the 1988–2003 models where they are found.
Table 4-7 Transmission types and system descriptions (sheet 1 of 3)
Transmission Transmission Features Notes
ZF 4HP 22 EH
4-speed RWD
3 shift programs: Economy, Sport and Manual
TCM 35-pin
TCC On/Off
First electronic transmission
in the U.S.
ZF 4HP 24 E9:
4-speed RWD
3 shift programs: Economy, Sport and Manual
TCM 35-pin
TCC On/Off
Identical to the 4HP22 but
can handle higher torque.
A4S 310 R THM R1
4-speed RWD
3 shift programs: Economy, Sport and Manual
Warm-up phase (sport shift, cold)
TCM 55-pin
TCC On/Off
Introduced on the 1990 525
as THM R1, changing to
A4S 310R. This BMW
transmission used by GM
has a Bosch control system.